Long-term studies

Conclusions regarding protein needs derived from short-term
balance studies should be confirmed by feeding at the proposed safe level for
three to six months. It is not practical to conduct the number of long-term
studies that would be required to include the many variations in age, sex,
physiological state, and genetic and environmental factors. However, several
excellent studies established the adequacy of the level of 0.8 g/kg of protein
predicted from the mean and confidence limits of the short-term studies (Rand
et al,
1984).